Overseam sewing-machine.



Kw L w m 1 H I: s 2 V J m D s 2 m M N T m m mi 3 Wm IIIIIIE iillllulmlllmnu T. RICHARDSON & J. H. BISHOP, JR. OVERSEAM SEWING MACHINE APPLIGATION FILED M310. 1905.

IN VENTORS No. 806,841. PATENTED DEC. 12, 1905.

' T. RICHARDSON & J. H. BISHOP, JR.

OVBRSEAM SEWING MACHINE.

APPLIGATIONPILBD MAR.10, 1905.

2 SHEETS-SHEET Z.

WITNESSES.

UNITED STATES PATENT oFFIoE.

THOMAS RICHARDSON AND JEROME H. BISHOP, JR, OF WYANDOTTE, MICHIGAN.

OVERSEAM SEWING-MACHINE.

Specification of Letters Patent.

Patented. Dec. 12, 19 5.

Applicati fil d March 10, 1905. Serial No. 249,3'18.

To all whom it may concern:

Be it known that we, THOMAS RICHARDSON, a subject of the King of Great Britain, and JEROME H. BISHOP, J r., a citizen of the United States of America, both residing atWyandotte, in the countyof Wayne and State of Michigan, have invented certain new and useful Improvements in Overseam Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in overseam sewing-machines in which the wellknown elements of horizontal feed-disks, a reciprocating needle, and an oscillating and vibratory looper are employed, the object of the invention being to perfect the operation of the machine, making it very accurate and not liable to get out of order or become broken, and also to provide means for accurately adjusting all of the parts to compensate for wear, so that the accuracy of adjustment may not be lost and so that breakage of the parts consequent upon loss of adjustment may be prevented.

To this end the invention consists in the peculiar arrangement of cams and in putting the several parts under spring-tension to hold the same firmly against their operating-cam surfaces without play or lost motion.

' The invention further consists in making the parts readily adjustable in relation to their cams, so that any wear may be compensated for and accuracy of adjustment maintained, and also in providing certain other new and useful features, all as hereinafter more fully described, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of a device embodying the invention with parts broken away to show the construction; Fig. 2,'a plan view of the same with the cap-plate or top removed. Fig. 3 is a longitudinal vertical section of the upper portion of the machine on the line as m of Fig. 2; Fig. 4, a transverse section of the same on the line y 3/ of Fig. 3 with the top removed, and Fig. 5 a detail showing the pivot-bearing for the looper. I

As shown in the drawings, 1 is the casing provided with bearings for a transverse driveshaft 2, and 3 is a horizontally-reciprocating needle-bar movable in bearings on the casing and actuated by a cam 4 on the drive-shaft. A horizontally-reciprocating guide-rod 5 is ward end and is provided with bearings for the fingerbar 8, which is free to turn therein and has a socket 9 at its forwardly-extended end to receive the downwardly and laterally curved loop-finger 10. The forwardly-projecting end of the needle-bar is provided with a holder 11 for the needle 12, which needle and loop-finger 1O reciprocate over the feeddisks 13 and 14, supported at the forward side of the casing. These described parts are all arranged and operate in the usual and wellknown manner, this invention consisting in the following-described means for imparting to the loop-finger the required vertical and oscillatory movement and in means for preventing any lost motion, &c.

- A pivot-bearing, by means of which the rear end of the looper bar or frame 7 is pivotally attached to the rear end of the guide-rod 5, is formed by securing to the end of the bar downwardly-extending arms 15, embracing the rear end of the guide-rod, and through screw-threaded openings in these arms opposite the guide-rod, turning centering-screws 16, having pointed and hardened ends to en gage slight depressions in the flattened end of the rod, lock-nuts 17 being provided on said screws to engage the outer sides of the arms and lock said screws from'turning. A pivot-bearing is thus formed upon which the bar turns easily and which may be adjusted to shift the position of the bar and to take up all lost motion caused by wear.

To vertically raise and lower the loop-finger 10 as it is moved forward and back by the cam 6, a track 18, having a cam-surface, is rigidly and adjustably supportedupon the side of the casing by studs 19, to the inner ends of which studs said track is secured, the same being secured to the wall of the casing by screws 20, passing through a horizontal slot 21 in the wall, so that by loosening the screws the track may be adjusted toward or from the front of the casing, and secured to the side of said looper-bar is a bracket 22, provided with a vertical socket for a verticallyadjustable pin 23, held therein bya set-screw 24 and adapted to engage at its lower end the upper cam-surface of the track, said pin riding upon the track and supporting the looper bar as said bar is reciprocated. The bracket is supported at one end by a stud-bolt 25, eX- tending through a bearing in the bracket and screwed into the looper-bar, and at its opposite end by a set-screw 26, which extends through a slotted opening in the bracket, so that the bracket may be turned on the studbolt to change the inclination of the pin 23. A coiled spring 27 is attached at one end to the said bracket and at its opposite end to any convenient part of the casing below to yieldingly hold the looper-bar down with the pin firmly in contact with its track.

' Near the side of the casing opposite that to which the track 18 is secured acam-wheel 28, having a peripheral cam-surface, is secured upon the driving-shaft 2, and above this cam upon the rotatable finger-bar 8 is adjustably secured, by means of a set-screw 29 to turn therewith, an outwardly and downwardly curved arm 30, which is provided with a vertically-extending contact-pin 31, acljustably secured in an opening in said arm by a setscrew 32, said pin being provided with a rounded lower end to engage and ride upon the cam-surface of the wheel. Laterallyextending pins 33 are provided on the arm 30, to which coiled springs 34: are attached at one end, the opposite ends of said springs being attached to any convenient part of the casing below to hold the said contact-pin in engagement with the cam. The loopingfinger is thus given the necessary vertical movement by the pin 23 sliding over the cam-surface of the track 18, which raises the looper-bar at the proper time and is given the necessary oscillatory movement by the pin31 riding on the cam 28, which cam operates to raise and lower the arm 30, and thus rock the fingerbar. By this arrangement of cams and the use of the springs all lost motion between the cams and the parts operated thereby is eliminated, and by making the contact-pins adjustable the wear of the parts may be compensated for, thus permitting the loopingfinger to be worked very close to the needle without danger of its breaking the same, as it will always travel in the same path. The peculiar iorm of pivot-bearing for the looperbar also prevents any lost motion of said bar, allows of a slight adjustment, and insures accuracy. The inclination of the pin 23 may be changed to secure the best results, and the relative positions of the looping-finger and the operating-arm 30 on the finger-bar may be changed by loosening the set-screw 29 and turning the arm on the bar. The construction is simplified and cheapened by this arrangement of parts, and may be quickly and easily taken apart and repaired.

Having thus fully described our invention, what we claim is i 1. In an overseam sewing-machine,the combination with a reciprocating needle-bar, an oscillating loop finger, and reciprocating means for carrying said finger; of a member having an upper cam-surface adjustably supported in the casing adjacent to and below said means and adapted to support the same, and means for yieldingly holding said carrying means in engagement with said cam member.

2. In an overseam sewingmachine,-the combination with a reciprocating needle-bar, a reciprocating looper-bar,and an oscillating loopfinger carried by said bar; of a horizontallyadjustable cam for vertically raising the loop'er-bar carried by the frame, adjustable means on the looper-bar for engaging the-cam and supporting the bar thereon, and a spring for holding said means in engagement with its cam.

3. In an overseam sewing-machine,the combination with a reciprocating needle-bar, a reciprocating looper-bar pivoted at one end and adapted to rise and fall at its opposite end, and a loop-finger carried by the movable end of the looper-bar; of a track having an upper cam-surface supported adjacent to the looperbar, vertically-adj ustable means on the looperbar for engaging the cam-surface of the track and supporting the said bar thereon, and a spring to hold said means in contact with said cam-surface.

4:. In an overseam sewing-machine,the combination with the drive mechanism, of a reciprocatingneedlebar,a reciprocating looperbar pivoted at one end on the reciprocating drive mechanism and adapted to rise and fall at its opposite end, a finger-bar journaled in bearings on said looper-bar, and a loop-finger secured to one end of the finger-bar; of a track having a cam-surface adjustably supported on the frame adjacent to the looper-bar, adjustable means on the looper-bar for engagingthe track to raise the bar vertically, a cam-wheel on the drive-shaft adjacent to the finger-bar having a peripheral cam-surface, a rock-arm on the finger-bar to engage the periphery of the cam-wheel, and a spring to hold the arm in contact with said cam.

5. In an overseam sewing-machine,the combination with a reciprocating needle-bar, a reciprocating looper-bar pivotally supported at one end, and a loop-finger carried by said looper-bar; of a member having an upper cam-surface supported adjacent to the looperbar, a vertically-adjustable pin on the looperbar to engage said cam member and support said bar thereon, and means for yieldingly holding said pin in contact with the surface of said member.

6. In an overseam sewing-machine, the combination with a reciprocating needle-bar, a reciprocating and vertically-movable looperbar, a finger-bar rotatable upon said looperbar, and a loop-finger secured to the end of said finger-bar; of an arm on the finger-bar, a vertically-adjustable pin carried by said arm, a cam-wheel having a peripheral camsurface engaged by said pin, and means for yieldingly holding said pin in contact with said cam-surface.

7. In an overseam sewing-machine, the combination with a driving-shaft, a horizontal needle-bar, a looper-bar pivoted at one end, cams on the shaft to reciprocate said needlebar and looper-bar, a rotatable finger-bar sup ported in bearings on the looper-bar, and a loop-finger on the end of the finger-bar; of a track having an upper cam-surface supported adjacent to the looper-bar, a bracket secured to the looper-bar and having a socket, a contact-pin in said socket to engage the cam-surface, a set-screw to hold the pin in its adjusted position in its socket, an arm in the finger-bar, a vertical contact-pin in an opening in said arm, a set-screw to hold the pin in its opening, a cam-wheel on the shaft having a peripheral cam-surface engaged by the pin on the arm, and a spring to hold said pin on the arm in contact with its cam-surface.

8. In an overseam sewing-machine, the combination with the casing having a horizontal slot in one side, of a driving-shaft supported in bearings 0n the casing, a horizontal needlebar, a cam on the shaft to reciprocate said needle-bar, a guide-bar, a cam on the shaft to reciprocate said guide-bar, a looper-bar pivotally attached at one end to said guidebar, a trackhaving an upper cam-surface, screws extending through the slot in the casing to adjustably secure the track thereto, a

stud-bolt on the looper-bar, a bracket pivotsurface, a finger-bar rotatable in bearingson.

the looper-bar, a downwardly-curved arm on the finger-bar adjustably secured thereto, a vertically-extending contact-pin in an opening in said arm, a set-screw to hold thepin in its opening, pins on the arm, springs attached at one end to said pins to hold the contact-pin in engagement with the cam-wheel.

In testimony whereof we aflix our'signatures in presence of two witnesses.

THOMAS RICHARDSON. JEROME H. BISHOP, JR.

Witnesses:

W. L. DEAN, W. E. DALE. 

